Exhaust welding

[Bongo-Shaftsbury]

The end pipe fell off my back box yesterday. Is it possible to weld one back on?
The back box looks in reasonable condition.
Is it just easier/cheaper to fit a new back box?

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The end pipe fell off my back box yesterday. Is it possible to weld one back on?
The back box looks in reasonable condition.
Is it just easier/cheaper to fit a new back box?

I had the same, that join is a bad bit of design. It's not difficult to get the pipe off and if you can find a short length of pipe that will slide inside the box and exhaust pipe it shouldn't be difficult to get it welded back together.

Some haven't bothered with putting the box back on just extended the exhaust pipe to the rear bumper - it isn't that much noisier and a lot less trouble.

A new pipe and back box cost about £50 + fitting.

[The Great Pretender]

Don't push a pipe inside the silencer it will increase back pressure and increase fuel consumption.

If removing the back box is ok then resistance should be reduced.

Has anyone else that monitors fuel consumption noticed that when the exhaust 'blows' fuel economy improves on a diesel engine?

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Don't push a pipe inside the silencer it will increase back pressure and increase fuel consumption.

Just enough to strengthen the joint shouldn't cause any problems as there is a length of straight pipe just inside the box on mine anyway, but chucking the whole useless lump away is better.

Next time mine goes, the straight pipe is going on instead.

[vanvliet]

Passed MOT no problem. Had it on for about a year so far .Stainless steel flexipie was lying around in the garage.
I am no expert but dont think that back pressure is an issue with diesels


http://i109.photobucket.com/albums/n54/ ... 47_IMG.jpg

http://i109.photobucket.com/albums/n54/ ... 49_IMG.jpg

[dobby]

Ours fell off the other week had a new back box supplied and fitted at wheel quick - similar to price above. Was tempted to straight pipe it as there was no major increase in noise. Problem is that you need to support the weight of the pipe in some way as it was banging on the rear axle cross bar (thing).

[Bongo-Shaftsbury]

Vanvliet, that is the dodgiest piece of bodge i've seen for a while. I love it!
How is it held up at the end?

[vanvliet]

Utilises standard bracket rubber .Yep 'tis a bodge but seems to be working fine and I like it better than the ugly original box.. When the whole lot goes i might sling on a stainless job but - - - we'll wait and see. The stainless flexi is heater pipe used in HGV's.
Probably my imagination but the van seems to respond to the throttle better.

[The Great Pretender]

Utilises standard bracket rubber .Yep 'tis a bodge but seems to be working fine and I like it better than the ugly original box.. When the whole lot goes i might sling on a stainless job but - - - we'll wait and see. The stainless flexi is heater pipe used in HGV's.
Probably my imagination but the van seems to respond to the throttle better.

It will go faster with less weight.

[vanvliet]

If in your travels you come across a broken Bongo - and a little way down the road -a forlorn looking bearded Bongo owner walking along the hard shoulder carrying what may appear to be a large black snake - - it will be me laying my flexi exhaust to rest Give me a peep as you pass !

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Probably my imagination but the van seems to respond to the throttle better.

As TGP quite expertly states, TD's neither need or like back pressure and respond better without it.

If the pipe over the rear axle on mine had been less like a length of lace tube when it broke, I would have made up a straight through pipe to replace the back box.